Replaceable needle point adapter for lubricating devices



REPLACEABLE NEEDLE POINT ADAPTER FOR LUBRICATING DEVICES Filed June 9, 1937 Maz-agr Patented Feb. 13, 1940 i UNITED: STATES PATENT. OFFICE* REPLACEABLE NEEDLE POINT ADAPTER FOR LUBRICA'EING DEVICES (.lha'rles W. Ginter, Bryan, Ohiassignor'to The" Aro Equipment Corporation, Bryan, Ohiol a cor- .poration of lOhio Application June 9, 1937-, serial No. 147,272

` '1.c1aim. (ci. 285-161) n An object of my present invention is to provide va very inexpensive replaceable needle point 'element for adapters used in connection with lubricating devices. p f

l A :further object is to provide such a replaceable lelement which is readily manufactured by simple stamping and 'drilling operations and yet the replaceable element can lbeiorinecl so that it cani readily beA sealed infan'adapter fitting and rwill effectively coact With thesmall 'bores ordi@ narily provided in'lubric'ant reception ittings 'and l nipples.

l A further-Objectis to `provide a' lubricant discharge fitting-with a replaceable relement therein comprising' a disk for interpos'ition between two separable parts of theA discharge ntting, such elementhaving a projectionvfadapted.for contact with lthe boreof a grease reception iitting and lhaving-acapillary perforation therein through 20 which' the lubricant enters such bore.

Another object `is to provide' an inexpensive replaceable element for a needle point adapter lor .lubricantv discharge -tting which eliminates vthe necessityof providing a'relatively long sleeve 25 as in theI usual types of needlepoint adapters and which is provided with a projection which is concave-convex and thereby'having a relatively thin upper e-nd which is drilledl through to provide a" bore for the lubricantin its passage from 30 vthe replaceable element,k to thegrease reception fitting.l v f v A further object is toprovide such a replaceable element so constructed that the length of the capillary lbore is substantially no greater than l35 the diameter of `the bore itself and-yetv Sunicient stock is providedA surrounding the bore to 'providefthe lnecessaryI strength for lubricating operations, the capillarybore being substantially f Yone 'thirty-second of an inch in diameter. The 4-0 iitting into which the needle adapter. projects is usually about one-sixteenth of. an inch in diameter. v"Ilhe relative sizes are important in that the lubricating device having the needle adapter.

56 Qiytlqlubricant leaking past the 4hereinafterv appear.v

adjacentedges of .the bores'of the adapter and lubricant reception nipple. "v

Another' `object is to `provide a replaceable.; grease tting engaging elementr for grease yguns' and the like which minimizes clogging of the capl "x1 y illary bore, necessary in adapters of the type for needle point .coaction With the :bore of a lubri'- p l cant .1"eception-tting, particularly by providing one which has arelatively .short bore and whichvv can be removedfand reversed in the adapter for' "10 cleaningpurposes. Thereafter it may be reversed j .therein `tosirnplify .the cleaning operation in the event'of'clogging A further object is to provide a needle 'point ladapter having a replaceable element which may be readily constructed by the screw `machine process if desired.

With these and other objects in view my invenf tion consists in the construction, arrangementl and combination of the various parts of myv dev l vice, wherebyfthe objectsfcontemplated are aty tained, as hereinafter morefully set forth, pointed out in my claimand illustrated in the accom-L panying drawing, in which:

f Figure l is .an enlargedv sectional View through a needle point adapter having a replaceable-lubricant reception nipple engaging element therey in showing'it in Contact Witha lubricantrecep .tion nipple.

Figure 2 is a View similar to` Figure 1, on a more greatly 'enlarged scale. l

Figure 3 is a side elevation of the needle point adapter showirigit .coacting with a lubricant reception fitting and mounted on a lubricant gun.

Figure lis a sectionalview of a portion of kFigure 2 showing the replaceable `element-in the 44:0

adapter reversed for cleaning out .the foreign ymatter lodged` therein, as illustrated in Figure 2.`

Figure 5 is a lmore greatly enlarged sectional view ofv a por-tion oi-ligurefZshowing how the replaceable element may-be tipped to variousv ari- .45 I

gles` and still secure Aproperfseal between the grease reception fitting and the replaceable element. ,f Figures 6 and 6a are sectional views through slightly `modiiecl -forms of my replaceable ,ele- 50 ment; and C ,v Figure 7 .is a sectional View similar to Figure 2 showing how `two of the replaceablel elements may be used tor secure further advantages as will tainer I2. The two are threaded'together as indicated at i4.

A replaceable disk D is illustrated, conned between a shoulder I5 of the sleeve I0 and a shoulder I3 ofthe retainer I2. 'Iheselsh'oulders are finished smoothly so that when the parts I0 and I2 are threaded tightly together'by means of a wrench, a seal is provided between the shoulders I6 and I8 and the disk D to prevent the escape of lubricant, event under extremely high pressures.

The disk D is obviously replaceable by unscrewing the retainer I2 from the sleeve IIJ and is also reversible as shown in Figure 4, the threads I4 being of suiiicient extent. to permit two of the disks to be inserted in the adapterA, as shown in Figure 7, if desired. I

'The disk D is preferably formed of a stamping having a projection 20 threaded in a semi-globular head. This projection is preferably concavoconvex, with the inner surface or depression inv dicated at 22 suilciently deep to stretch the material and reduce its thickness at the outer end of the' projection, which end is provided with a capillary bore indicated at 24, This bore is of less diameter than the bore 26 of the lubricant reception iitting L, as best shown in Figure 5, to provide suicient stock between 'the edges of the two bores for sealing purposes, even when the disk D is forced against the lubricant vreception fitting L at anangle, as illustrated. The disk D is of sufcient thickness to have the necessary strength for preventing its buckling under the force of the lubricant at high pressure, and pref- .erablynot more than one thirty-second of an inch.

:By` making theprojection 20 concavo-convex, lthe bore 2li is relatively short and is shortened Vvfurther by the stretching of the material -of -the disk where the projection` 2@ is formed. This materially reduces the likelihood of clogging, since the bore 24 is so short that ordinarily any small particle of foreign matter in the lubricant getting into the bore can pass on through it instead of lodging in it, as when relatively long bores'areprovided, particularly where such bores are continuations of slightly larger bores.

Although likelihood of clogging is reduced to a minimum, by such an arrangement, it is, of

course, obvious that any particle larger than the bore and of sufficient rigidity to resist breaking I.

, intosmaller pieces under the high pressure of the adapter.

lubricant being dispensed, will clog the bore 24, as illustrated by the particle P in Figure 2.

. Y Thereupon the particle can be removed by separating the parts Ill and I2 of the adapter and reversing the disk D as shown in Figure 4 and` then dischargingr a shot of lubricant from the This will force the particle out of the depression 22 of the disk as indicated by the arrow a whereupon the disk can be reversed and lubricating operations continued.

The disk'D vcan also be made as a screw machine part, such a disk being'shown at P' in Figure 6. y It has the projection 2li' and a bore 24.

-be reasonably included within their scope(` has a projection 20 on each end thereof. With n such a construction the element isv reversible in the manner hereinafter described in connectionv` with Figure 7. p l l I have shown in Figure 7 two of the disks D,

used back to back with their projections arranged in opposition to each other; This facilitates the v cleaning operation as when'a particle such as P becomes lodged in the bore of the inner' disk, it may be expelled by reversing thedisks, where-k upon it will assume the position P". Thereafter the lubricating operations can be continued with--l out the necessity .of again reversing the disks. When lthe disks are arranged as illustrated, the projection of the innerone tends to deflect the particle P in the direction of the arrow b, thus further reducing the likelihood of clogging.

I have provided an element which is readily replaceable with but a minimum of expense and which therefore can be removed and thrown away after clogging if it `is clogged so tightly'that it is difficult to unclog it by the vpressure of the lubricant. Furthermore, the relatively short bore, p

being substantially no longer than its diameter, reduces the likelihood of clogging to a minimum.'

The retainer I2 is preferably provided with a guiding socket 28 adapted to coact with thepe-` ripheral edge 3l! of the lubricantfitting L during AlthoughI have illustrated the fitting L as bef. l

ing a Zerk fitting, 'it obviously can-benny type having a bore slightly larger thany the bore 24 and yet small -enough to effect ayseal by con-` tact-of its periphery with the projection'2 0;.

.1f at any time the disk element D` becomes damaged or lost and the operator does not have f another one to replace it, the sleve I2 can-bercev moved and the sphericalconcave seat Il of the tting'part I0 placed against the `lubricantie- .ception iitting L -in the ordinary manner. Such coaction of ythe adapter and fitting, ,ofr course, requires greater pressure than when theneedle point disk is used for -coaction with the'bore 26 of the tting L, which has a much smaller area. Some changesmay be made in the:;construc tion and arrangement ofthe parts of my device f without departing from the real spiritand purpose of my invention, and vit is my intention to cover by my claim anymcdied forms 0f structure or use of mechanical equivalents which may I claim as'my invention:

A needle point adapter for lubricating devices comprising a tting having aty leasttwo` parts,v

forming thereby a receiving chamber, said `parts vhaving opposite faces, la pair of similar disk elements each having a central protuberance formed .y on one face which is perforated with a 'capillary bore, said disk elements' being positioned within said receiving chamber and conned'b'etween said opposite faces with their protuberances exfi tending in opposite directions, whereby v said disk elements may be reversed'within said 'chamber for cleaning purposes and used 'for'y lubricating purposes in either of their reversed positions. 1

- CHARIES wijGIN'rEas' 

